Gamma-Glutamyl Transferase (GGT) is a biomarker that plays a crucial role in assessing longevity and overall health. It is primarily found in the liver and helps to metabolize glutathione, an essential antioxidant that protects cells from damage. Elevated levels of GGT in the blood are often associated with liver disease, alcohol consumption, and other health issues, making it a valuable indicator of potential health risks. Additionally, GGT levels have been linked to cardiovascular disease and mortality, making it a significant biomarker for longevity assessment. Regular monitoring of GGT levels can provide important insights into an individual’s health and potential lifespan.